9
By: GROUP ONE Ben, Wai Xin , Weng Kit ,Juin Zhuen ,Chen Hong

Contact Process & Haber Process

Embed Size (px)

Citation preview

Page 1: Contact Process & Haber Process

By: GROUP ONE

Ben, Wai Xin , Weng Kit ,Juin Zhuen ,Chen Hong

Page 2: Contact Process & Haber Process

Raw Materials used in the Contact Process are sulphur, air and water.

Sulphuric Acid is manufactured by using Contact Process

The Contact Process involves three stages.

Page 3: Contact Process & Haber Process

STAGE IProduction of sulphur

dioxide gasThis can be done by

using two methods:1)Burning sulphur in

dry air in the furnace2)Burning metal

sulphide in dry air

STAGE IIConversion of SO2 to SO31)Dry Sulphur Dioxide

with excess oxygen are passed through a converter

2)SO2 is converted to SO3 if there is presence of vanadium oxide ,V2O5 as catalyst , temperature between 450-550 degree Celsius and pressure of one atmosphere

Page 4: Contact Process & Haber Process

Production of sulphuric acid1) In the absorber , sulphur trioxide is dissolved

in concentrated sulphuric acid to produce oleum, H2S2O7 , a viscous liquid.

2) Oleum is the diluted with an equal volume of water to produce concentrated sulphuric acid.

H2S2O7+ H2O 2H2OSO43) The two reactions on stage III are equivalent

to adding sulphur trioxide in water. SO3 +H2O H2SO4

Page 5: Contact Process & Haber Process
Page 6: Contact Process & Haber Process

In the year 1918 , Fritz Haber was awarded the Nobel Prize for his discovery of the industrial manufacture of ammonia gas from hydrogen gas and nitrogen gas.

Page 7: Contact Process & Haber Process

Nitrogen gas used in Haber Process is obtained from the fractional distillation on liquid air

Hydrogen used in Haber Process can be obtain from two method:

1)The reaction between steam and heated coke (carbon) H2O+CCO+H2

2)The reaction between steam and natural gas(consists mainly methane CH4)

Page 8: Contact Process & Haber Process

I) A mixture consisting of one volume of nitrogen gas and three volumes of pure and dry hydrogen gas is compressed to a pressure between 200-500 atmosphere

II) The gas mixture in passed through a catalyst of powdered iron at a temperature of 450-550 degreed Celsius

III) At this optimum temperature and pressure ammonia gas is produced.

Page 9: Contact Process & Haber Process